A water jacket exhaust pipe for a diesel engine

Abstract

The present invention discloses a water-jacketed exhaust pipe for a diesel engine, comprising an outer pipe and an inner pipe coaxially arranged in an inner cavity of the outer pipe, wherein two ends of the outer pipe are respectively provided with a water inlet pipe and a water outlet pipe connected with a cold water cavity between the outer pipe and the inner pipe, baffles with a plurality of flow guide pipes are respectively provided at the water inlet and the water outlet of the outer pipe near the water inlet and the water outlet, an outlet pipe and a plurality of air inlet pipes are provided on the side of the inner pipe, the outlet pipe and the air inlet pipe are respectively located on two sides of the inner pipe, the outlet pipe is located in the center of the inner pipe and a supercharger connecting plate is provided at the end thereof, and through the design of the inner and outer pipes, cold water circulates between the inner and outer pipes to reduce the temperature of the exhaust pipe, thereby effectively reducing the working temperature of the engine and prolonging the service life of the exhaust pipe, and the exhaust pipe is very suitable for use in high-power generators.

Description

[Technical field]

[0001] The invention relates to the technical field of engines, in particular to the technical field of a water jacket exhaust pipe of a diesel engine. [Background technology]

[0002] The engines used in ships are high-power marine engines, which generate a lot of heat when working, making the temperature of the engine body very high, and this heat is mainly dissipated outwards through the exhaust pipe. The exhaust pipe of the diesel engine usually adopts a dry exhaust pipe, and there is no effective heat insulation layer on its outer shell, which generally makes the cabin noisy, the indoor temperature is high, and the working environment is poor, which is not only not conducive to the health of the staff, but also has safety hazards, and it is difficult to meet the needs of actual use. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a water jacket exhaust pipe for a diesel engine, which can effectively reduce the operating temperature of the engine and prolong the service life.

[0004] To achieve the above-mentioned purpose, the present invention proposes a water-jacketed exhaust pipe for a diesel engine, comprising an outer pipe and an inner pipe coaxially arranged in the inner cavity of the outer pipe, wherein the two ends of the outer pipe are respectively provided with a water inlet pipe and a water outlet pipe connected to the cold water cavity between the outer pipe and the inner pipe, and baffles with a plurality of guide pipes are respectively provided at the water inlet and the water outlet of the outer pipe near the water inlet and the water outlet, and the side of the inner pipe is provided with an outlet pipe and a plurality of inlet pipes passing through the outer pipe, and the outlet pipe and the inlet pipe are respectively located on both sides of the inner pipe, and the outlet pipe is located in the center of the inner pipe and a supercharger connecting plate is provided at the end.

[0005] Preferably, the outer tube includes a base plate and an outer shell, the outer shell is fixed to the base plate by a plurality of bolts, the base plate is provided with a plurality of air inlets corresponding to the air inlet pipe, and the outer shell is provided with an air outlet corresponding to the air outlet pipe.

[0006] Preferably, a plurality of corresponding preset holes are provided on the bottom plate and the outer shell, positioning guide tubes are fixed on the hole walls of the preset holes, and the bolts are located in the positioning guide tubes.

[0007] Preferably, the length of the positioning conduit is consistent with the distance from the bottom plate to the top plate of the shell.

[0008] Preferably, a panel is also provided on the shell.

[0009] Preferably, the water inlet pipe is located on the right side of the shell, and the water outlet pipe is located on the top left side of the shell.

[0010] Preferably, the air outlet pipe passes through the outer pipe at an angle, and the angle between the air outlet pipe and the outer pipe is 30 to 60 degrees.

[0011] Preferably, the baffles are respectively separated between the end of the inner tube and the water inlet of the water inlet pipe and the water outlet of the water outlet pipe, and the guide pipes are evenly distributed on the baffles. The other end of the guide pipes is toward the center of the inner tube and is arranged around the outer wall of the inner tube.

[0012] The beneficial effects of the present invention are as follows: through the design of the inner and outer pipes, the present invention allows cold water to circulate between the inner and outer pipes to reduce the temperature of the exhaust pipe, thereby effectively reducing the operating temperature of the engine and extending the service life of the exhaust pipe, and is very suitable for use in high-power generators; by providing a positioning guide, the diameter of the hole through the bolt is reduced, and it plays a guiding role during the installation of the bolt to prevent it from tilting, thereby ensuring the fixation between the outer shell and the bottom plate; by providing baffles that are respectively separated between the end of the inner pipe and the water inlet of the water inlet pipe and the water outlet of the water outlet pipe, it is avoided that the water flow directly impacts the end of the inner pipe when entering and exiting, so that the water flow flows in parallel along the outer wall of the inner pipe, thereby preventing the occurrence of water leakage due to loosening of the inner pipe.

[0013] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a water jacket exhaust pipe for a diesel engine according to the present invention from one viewing angle;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of a water jacket exhaust pipe for a diesel engine of the present invention from another perspective;

[0016] Figure 3 This is a front view of a water jacket exhaust pipe for a diesel engine according to the present invention;

[0017] Figure 4 It is a top view of a water jacket exhaust pipe of a diesel engine according to the present invention;

[0018] Figure 5 yes Figure 4 Sectional view along AA direction;

[0019] Figure 6 The utility model is a left side view of a water jacket exhaust pipe of a diesel engine according to the present invention.

[0020] In the figure: 1-outer tube, 11-bottom plate, 111-air inlet, 12-outer shell, 121-air outlet, 122-panel, 2-water inlet pipe, 3-water outlet pipe, 4-baffle, 41-guide pipe, 5-supercharger connecting plate, 6-bolt, 7-positioning guide tube, 8-inner tube, 81-inlet pipe, 82-outlet pipe. [Specific implementation method]

[0021] See also Figures 1 to 6The present invention discloses a water-jacket exhaust pipe for a diesel engine, comprising an outer pipe 1 and an inner pipe 8 coaxially arranged in the inner cavity of the outer pipe 1, wherein the two ends of the outer pipe 1 are respectively provided with a water inlet pipe 2 and a water outlet pipe 3 connected to the cold water cavity between the outer pipe 1 and the inner pipe 8, wherein a baffle 4 with a plurality of guide pipes 41 is respectively provided at the water inlet and the water outlet near the water inlet pipe 2 and the water outlet pipe 3 in the outer pipe 1, wherein the side of the inner pipe 8 is provided with an outlet pipe 82 and a plurality of inlet pipes 81 passing through the outer pipe 1, wherein the outlet pipe 82 and the inlet pipe 81 are respectively located on both sides of the inner pipe 8, wherein the outlet pipe 82 is located in the center of the inner pipe 8 and a supercharger connecting plate 5 is provided at the end thereof, wherein the outer pipe 1 comprises a bottom plate 11 and an outer shell 12, wherein the outer shell 12 is fixed to the bottom plate 11 by a plurality of bolts 6, wherein the bottom plate 11 is provided with a plurality of inlet ports 111 corresponding to the inlet pipe 81, The shell 12 is provided with an air outlet 121 corresponding to the air outlet pipe 82, and the bottom plate 11 and the shell 12 are provided with a plurality of corresponding preset holes. A positioning conduit 7 is fixed on the hole wall of the preset hole, and the bolt 6 is located in the positioning conduit 7. The length of the positioning conduit 7 is consistent with the spacing from the bottom plate 11 to the top plate of the shell 12. The shell 12 is also provided with a panel 122. The water inlet pipe 2 is located on the right side of the shell 12, and the water outlet pipe 3 is located on the top left side of the shell 12. The air outlet pipe 82 obliquely passes through the outer tube 1, and the angle between the air outlet pipe 82 and the outer tube 1 is 30 to 60 degrees. The baffle 4 is respectively separated between the end of the inner tube 8 and the water inlet of the water inlet pipe 2 and the water outlet of the water outlet pipe 3. The guide pipe 41 is evenly distributed on the baffle 4, and the other end of the guide pipe 41 is arranged toward the center of the inner tube 8 and around the outer wall of the inner tube 8.

[0022] Working process of the present invention:

[0023] When the diesel engine is working, the gas exhausted from the cylinder enters the inner tube 8 through a plurality of inlet pipes 81 and is collected, and then leaves through the outlet pipe 82, thereby entering the supercharger. At the same time, cold water enters the cold water cavity between the outer tube 1 and the inner tube 8 through the water inlet pipe 2, and then leaves through the water outlet pipe 3. During the flow of the cold water, it absorbs heat, lowers the temperature of the outer tube 1 and the inner tube 8, and thus lowers the temperature in the cabin. Since the baffle 4 is respectively separated between the end of the inner tube 8 and the water inlet of the water inlet pipe 2 and the water outlet of the water outlet pipe 3, when the cold water enters the outer tube 1, it first directly impacts the baffle 4, then is guided by a plurality of guide pipes 41, passes over the end of the inner tube 8, flows in parallel to the outer wall of the inner tube 8 from a plurality of ports, and finally flows out parallel to the outer wall of the inner tube 8 from a plurality of ports through the guidance of the guide pipe 41 of the baffle 4 at the other end.

[0024] The present invention allows cold water to circulate between the inner and outer pipes through the design of the inner and outer pipes, thereby reducing the temperature of the exhaust pipe, thereby effectively reducing the operating temperature of the engine and extending the service life of the exhaust pipe, and is very suitable for use in high-power generators; by providing a positioning guide tube, the diameter of the hole through which the bolts are inserted is reduced, and a guiding role is played during the installation of the bolts to prevent them from tilting, thereby ensuring the fixation between the outer shell and the bottom plate; by providing baffles that are respectively separated between the end of the inner pipe and the water inlet of the water inlet pipe and the water outlet of the water outlet pipe, it is avoided that the water flow directly impacts the end of the inner pipe when entering and exiting, so that the water flow flows in parallel along the outer wall of the inner pipe, thereby preventing the occurrence of water leakage due to the loosening of the inner pipe.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A water jacket exhaust pipe for a diesel engine, characterized in that: The invention comprises an outer tube (1) and an inner tube (8) coaxially arranged in the inner cavity of the outer tube (1), wherein the two ends of the outer tube (1) are respectively provided with a water inlet pipe (2) and a water outlet pipe (3) which are connected to the cold water cavity between the outer tube (1) and the inner tube (8), and a baffle (4) with a plurality of flow guide pipes (41) is respectively provided at the water inlet of the water inlet pipe (2) and the water outlet of the water outlet pipe (3) in the outer tube (1), and the side of the inner tube (8) is provided with a An air outlet pipe (82) and a plurality of air inlet pipes (81), the air outlet pipe (82) and the air inlet pipe (81) being located on both sides of the inner pipe (8), respectively; the air outlet pipe (82) being located in the center of the inner pipe (8) and having a supercharger connecting plate (5) disposed at the end thereof; the outer pipe (1) comprising a bottom plate (11) and an outer shell (12), the outer shell (12) being fixed to the bottom plate (11) by a plurality of bolts (6), the bottom plate (11) being provided with a plurality of bolts connected to the air inlet pipe (8 1) an air inlet (111) corresponding to the air outlet pipe (82), the shell (12) is provided with an air outlet (121) corresponding to the air outlet pipe (82), the bottom plate (11) and the shell (12) are provided with a plurality of corresponding pre-set holes, a positioning conduit (7) is fixed on the hole wall of the pre-set hole, the bolt (6) is located in the positioning conduit (7), the length of the positioning conduit (7) is consistent with the distance between the bottom plate (11) and the top plate of the shell (12), and the baffle (4) is divided into The guide pipes (41) are respectively separated between the end of the inner tube (8) and the water inlet of the water inlet pipe (2) and the water outlet of the water outlet pipe (3); the guide pipes (41) are evenly distributed on the baffle plate (4); the other end of the guide pipes (41) faces the center of the inner tube (8) and is arranged around the outer wall of the inner tube (8); the outer shell (12) is also provided with a panel (122); the water inlet pipe (2) is located on the right side of the outer shell (12); and the water outlet pipe (3) is located on the top left side of the outer shell (12); When the diesel engine is working, the gas exhausted from the cylinder enters the inner tube (8) through the plurality of intake pipes (81) and is collected therein, and then leaves through the exhaust pipe (82) and enters the supercharger; at the same time, cold water enters the cold water cavity between the outer tube (1) and the inner tube (8) through the water intake pipe (2), and then leaves through the water outlet pipe (3); When the cold water enters the outer tube (1), it first directly impacts the baffle (4), then is guided by a plurality of guide tubes (41), passes over the end of the inner tube (8), flows in from a plurality of openings parallel to the outer wall of the inner tube (8), and finally is guided by the guide tubes (41) of the baffle (4) at the other end, and flows out from a plurality of openings parallel to the outer wall of the inner tube (8).

2. A water jacket exhaust pipe for a diesel engine as claimed in claim 1, characterized in that: The air outlet pipe (82) obliquely passes through the outer pipe (1), and the angle between the air outlet pipe (82) and the outer pipe (1) is 30 to 60 degrees.

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